<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <title>houdunren.com</title>
  </head>
  <body></body>
  <script>
    let hd = "houdunren2200hdcms9988";
    // let nums = [...hd].filter(a => !Number.isNaN(parseInt(a)));
    // console.log(nums.join(""));
    console.log(hd.match(/\d/g).join(""));
  </script>
</html>
